Table 3.
The V14 and adverse effects of five-fraction CyberKnife radiotherapy
| Brainstem (14) | Cerebellum (14) | Cerebrum (57) | |
|---|---|---|---|
| Median tumor volume (cm3) (range) | 7.4 (0.5–16.6) | 12.6 (5.4–23.0) | 14.3 (2.5–45.0) |
| Median prescribed isodose (%) (range) | 57 (51–67) | 62 (53–67) | 58 (50–76) |
| Median marginal dose (Gy) (range) | 31 (29–35) | 31 (31–39) | 31 (25–40) |
| Median maximum dose (Gy) (range) | 55.4 (46.3–60.8) | 52.4 (46.3–61.4) | 55.3 (39.5–67.8) |
| Median V14 (cm3) (range) | 3.0 (0.3–6.4) | 6.2 (2.6–11.2) | 5.7 (1.8–20.0) |
| Symptomatic brain edema | 0/14 | 0/14 | 8/57 |
| V14 (cm3) | 3.0–5.9 | ||
| Radiation necrosis | 0/14 | 0/14 | 2/57 |
| V14 (cm3) | 9.2–19.7 |